This report is very strange and so is the Slashdot summary. This is not a comparison of hardware platforms, i.e. wether Apple or Samsung phones actually experience some form of hardware failure more often. Instead the report focuses on software issues, like application crashes, which form the bulk of "failures". Also reported are difficulties in accessing Wifi or poor sound quality using Bluetooth.
Their use of statistics is also questionable. Their graphics are misleading.
Take this report with a grain of salt.